Fix buggy import of artifact repository.

[modular-magician]

Fixes #6936.

The issue here is that in this resource, name is an output, repository_id is what we'd normally call name.

Release Note Template for Downstream PRs (will be copied)

artifactrepository: Fix import failure of `google_artifact_registry_repository`.

Derived from GoogleCloudPlatform/magic-modules#3838

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[ghost]

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